CN1985067B - Methods of controlling particulates, method for coating partial surface of underground stratum and fluid for controlling clastic particles - Google Patents
Methods of controlling particulates, method for coating partial surface of underground stratum and fluid for controlling clastic particles Download PDFInfo
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- CN1985067B CN1985067B CN2005800188842A CN200580018884A CN1985067B CN 1985067 B CN1985067 B CN 1985067B CN 2005800188842 A CN2005800188842 A CN 2005800188842A CN 200580018884 A CN200580018884 A CN 200580018884A CN 1985067 B CN1985067 B CN 1985067B
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- Prior art keywords
- tackifier compound
- aqueous tackifier
- aqueous
- fluids
- activator
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- 208000035126 Facies Diseases 0.000 description 1
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- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 1
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- 150000001450 anions Chemical class 0.000 description 1
- 239000003125 aqueous solvent Substances 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 229920006317 cationic polymer Polymers 0.000 description 1
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- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
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- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 1
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- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/5083—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/516—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls characterised by their form or by the form of their components, e.g. encapsulated material
- C09K8/518—Foams
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/66—Compositions based on water or polar solvents
- C09K8/68—Compositions based on water or polar solvents containing organic compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/66—Compositions based on water or polar solvents
- C09K8/68—Compositions based on water or polar solvents containing organic compounds
- C09K8/685—Compositions based on water or polar solvents containing organic compounds containing cross-linking agents
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/80—Compositions for reinforcing fractures, e.g. compositions of proppants used to keep the fractures open
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
- E21B33/138—Plastering the borehole wall; Injecting into the formation
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
- E21B43/267—Methods for stimulating production by forming crevices or fractures reinforcing fractures by propping
Abstract
The present invention relates to aqueous tackifiers and methods of controlling particulates in subterranean formation using aqueous tackifiers. Some embodiments of the present invention provide methods of controlling particulates, comprising placing an aqueous tackifier compound into a portion of a subterranean formation comprising unconsolidated particulates; and, activating the aqueous tackifier compound. Other embodiments of the present invention provide methods of coating a portion of a surface in a subterranean formation comprising substantially coating an aqueous tackifier compound onto a portion of a subterranean formation; and, activating the aqueous tackifier compound. Other embodiments of the present invention provide treatment fluids for controlling fine particulates, comprising a servicing fluid and an aqueous tackifier compound.
Description
Technical field
The present invention relates to aqueous tackifier and use aqueous tackifier to control the method for the particle in the subterranean strata.
Background technology
The hydrocarbon producing well is normally handled by hydraulic fracture and is increased production.In hydraulic fracture is handled, also sent in the Production Regional with certain speed and compression pump as the viscosity fracturing fluid of carrier fluid, so that the subterranean strata fracture, and in this zone, form one or more cracks.Usually, when this fracturing fluid was converted into the rare fluid that turns back to the surface, the granular solids such as the sand of classification that are suspended in a part of fracturing fluid were deposited in the crack.These granular solids, perhaps " proppant particles " is used for preventing that the crack is closed fully, to have formed the conduction pathway that the hydro carbons produced can flow through.
A kind ofly be particularly suitable for low closure stress condition, extend down at earth crust structure that viewed hydraulic fracture processing is that hydraulic pressure splits in the shallow degree of depth reservoir usually.In the water fragmentation, fracturing fluid contains low-down or zero proppant particulates concentration.This process is not to rely on proppant particles to support the crack, but the natural conductibility that nature produced that depends on by the stratum self-supporting prevents closing up of cracks.The coal bed methane reservoir is the instance that does not have the storage well that is suitable for proppant particles that hydraulic pressure splits.
Unfortunately, producing improvement and barefoot completion can the non-persistent stratum of negative effect, for example coal seam, rich organic shale, clay or rich organic chip and high fracture friable rock.In these stratum, the anisotropy of mechanical force or natural in-situ stress may cause being called as the geologic process of spallation, has wherein caused that in the change relevant with stress of stratal surface fine particulates " chip " " peels off " or throw off from the stratum.These chips can block the clearance space in proppant filler or self-supporting crack, and reduce the conductibility in crack, the potential production of restriction well.In addition, loose chip also possibly corrode or cause that so must come out with the fluid separation that is generated usually, this has increased other expense for this activities to the noticeable wear of employed process units in reclaiming technology.
Before comprised tackify, flocculation and cohesion for controlling the trial that perhaps alleviates the influence of loose fines.Through these methods, prevented the obstruction that when these particles move, flows in formed crack for the loose fines that in shattering process, is produced.Yet the existing solution of great majority does not stress before the stratum to be carried out in operation the notion of precondition.In addition; Existing solution also lacks remedial ground usually and handles the ability that chip is stablized or controlled in the crack; And much do not provide activation is controlled to handling of fluids ability (for example; Handling of fluids possibly not be introduced in the crack, is activated the influence of controlling or alleviating loose fines then).
Summary of the invention
The present invention relates to aqueous tackifier and use aqueous tackifier to control the method for the particle in the subterranean strata.
Embodiments more of the present invention provide the method for control particle, and it comprises: aqueous tackifier compound is placed in the part that comprises the subterranean strata of fixed particle not; And, this aqueous tackifier compound of activation.
Other embodiment of the present invention provides the method on the part surface of coating subterranean strata, and it comprises: fully aqueous tackifier compound is applied on a part of subterranean strata; And, this aqueous tackifier compound of activation.
Other embodiment of the present invention provides the handling of fluids that is used to control detrital grain, and it comprises servicing fluids and aqueous tackifier compound.
For a person skilled in the art, after the preferred embodiment below having read, characteristics of the present invention and advantage will be conspicuous.
The specific embodiment
The present invention relates to aqueous tackifier and use aqueous tackifier to control the method for the particle in the subterranean strata.
According to the present invention, can aqueous tackifier compound be introduced in a part of subterranean fracture.Employed in this article term " viscosity ", the material of (perhaps can the be activated into into) slightly viscous that in its form of ownership, typically refers to that is in the sense of touch itself.
Suitable aqueous tackifier compound can form partial coating at least on surface (for example, stratal surface or particle).In some embodiments, at first preliminary treatment contact particle surface prepares for its coating aqueous tackifier compound.Usually; Suitable aqueous tackifier compound is not a viscosity being placed in lip-deep the time; But can be " activated " (just gone to stablize, coalescence and/or reaction), so that this compound is transformed into the tackified compound of viscosity in the moment of hope.Such activation possibly occur in this aqueous tackifier compound place before the subterranean strata, among or afterwards.
In the concrete embodiment of the present invention; In a single day this aqueous tackifier compound is activated; Can also on the exposed surface of subterranean strata, form adhesive network effectively; When being exposed to the anisotropy of mechanical force or natural reservoir stress, this adhesive network can reduce the stratum spallation or produce the tendency of detrital grain.Through be coated with the exposed surface on stratum with the aqueous tackifier compound of activation, seldom detrital grain can be freed one's minds, thereby has limited chip to the issuable negative effect of well production.
Embodiments more of the present invention have been described the use aqueous tackifier compound and have been controlled the discrete particles that is present in the subterranean strata and stablize the interface zone in the subterranean strata, perhaps produce particle (being also referred to as " chip " sometimes) to hinder from interface release.Term used herein " unconsolidated " be meant loose particles ground not bonding or very a little less than be bonded together bondingly, to such an extent as to the situation that can move with the fluid that in the part subterranean strata, moves.In some embodiments of the present invention, in a single day aqueous tackifier compound is activated, and comes stable particle with regard to helping through the flocculate of improved form.In common flocculate, the particle of tackify together; Yet the particle of the viscosity that the improvement flocculate that produces through aqueous tackifier compound of the present invention also allows to flocculate adheres on the surface (for example, the surface of formation face or another particle) that they contact.Even still keep viscosity because these particles are shaken off to get off from the surface that they adhered to by tackify and when the flocculation particle, so they have another lip-deep ability that adheres to.This particle that has further reduced tackify possibly weaken the possibility of the output of said well.
Specific embodiments of the present invention also provides to be remedied subterranean fracture and not to need repetition fragmentation or regelation possibly be deposited on the method for the proppant particles in the crack.The present invention includes " corrective operation " (promptly; Wherein the proppant filler is in place, and undesirable backflow has begun to take place and need remedy or operate, and wherein the stratum has begun the operation that spallation and unsettled surface of stratum need be remedied) embodiment in; Aqueous tackifier compound of the present invention can be particularly suitable; Because to a certain extent, they can be used as non-stick substance and place in the zone to be remedied, and are activated to then to demonstrate viscous characteristics.
Aqueous tackifier compound of the present invention normally comprises the charged polymer of following compound; In the time of in being in aqueous solvent or solution; This compound can form unsclerotized coating (through himself or with activator); And marquis in the time of on placing particle, the continuous breakpoint that can increase this particle when it contacts with current is floating velocity (in embodiment 7, having done to further describe) again.This aqueous tackifier compound has improved the contact of the particle between the individual particle (they are proppant particles, formation fines or other particle) in the stratum-particle, helps to make that said particle is fixed gathers in being, deflection and permeable material.
The instance of the aqueous tackifier compound that is suitable for using among the present invention includes but not limited to: acrylate copolymer; Acrylate polymer; The acrylic acid derivative polymer; Acrylate homopolymer; Voncoat R 3310 (PMA for example; Butyl polyacrylate and polyacrylic acid 2-Octyl Nitrite); Acrylate copolymer; The methacrylic acid derivative polymer; The methacrylic acid homo thing; Methacrylic acid ester homopolymer (polymethyl methacrylate for example; Polybutyl methacrylate and polymethylacrylic acid 2-Octyl Nitrite); Acrylamido-methyl-propane sulfonic acid ester polymer; Acrylamido-methyl-propane sulfonic acid ester derivant polymer; Acrylamido-methyl-propane sulfonic acid ester copolymer; With acrylic acid base-methyl-propane sulfonic acid ester copolymer and their combination.
Though there is the potential method that much is used for confirming to be fit to aqueous tackifier; But the method for a kind of practicality of selection suitable polymers is following: polymer to be tested is set at conc forms (that is to say; The concentration of about 20-50%), and to it add activator.Rule of thumb, form solid or semi-solid material, represent that then this polymer is the suitable aqueous tackifier of the present invention if this mixture seems to condense.Form solid or semi-solid material if this mixture looks not condense, then should select other a kind of activator and repeat this test.Those skilled in the art can select possible activator after having known the result of condensing who hopes.For example, when test is suitable as the time marquis of the acrylate polymer of aqueous tackifier, the mixture that comprises 50% acetic anhydride and 50% glacial acetic acid (v/v) is possible activator.The selection of aqueous tackifier compound possibly depended on the condition (for example, salinity, temperature and/or pH) of down-hole especially.For all suitable aqueous tackifier compound, the relation between these and other conditions down-hole is not consistent.For example, high salinity possibly quickened the activation of some aqueous tackifier compound, then possibly postpone activation for other compound.Those skilled in the art can confirm the influence of concrete conditions down-hole to selected aqueous tackifier compound.For example, marquis when using polyacrylate polymers, high salinity or extreme pH (be higher than about 9 or be lower than about 5) quicken activation usually.
Suitable aqueous tackifier compound is charged polymer normally, and they preferentially are bonded on the surface with opposite charges.For example, the aqueous tackifier compound that has a negative electrical charge can preferentially be bonded in to be had just to the surface of neutral zeta potential and/or on the hydrophobic surface.Likewise, use similar chemicals, positively charged tackifier compounds can preferentially adhere to have and bear to the surface and/or hydrophilic surface of neutral zeta potential.For example, people can use material previously treated for example cationic polymer handle surface with negative ξ electromotive force, perhaps use anion preliminary treatment thing to handle surface with positive ξ electromotive force.Those skilled in the art will appreciate that and also can use both sexes and the pretreatment fluid both sexes particle, as long as can make them demonstrate the electric charge of hope under the exposure condition in their use.Be processed therein in the specific embodiments that surface (stratum or particle) lacks enough acceptance surfaces (promptly; The surface that is processed lacks and the opposite basically electric charge of selecteed aqueous tackifier compound), can use pretreatment fluid to make said surface more can accept aqueous tackifier compound.The appropriate pretreatment fluid comprises charged fluids, and it comprises charged surfactant, charged polymer or their combination.It will be understood by those of skill in the art that under the help of the application's disclosure pretreated use is the inhomogeneities of choosing wantonly and depend on electric charge at least in part, or lack property in selected aqueous tackifier compound and the electric charge that is processed between the surface.
Almost any subterranean strata part can use aqueous tackifier compound of the present invention to handle.The instance on stratum includes but not limited to: coal stratum and contain iron ore such as the stratum of siderite, magnetic iron ore and bloodstone.It is manageable that the clay pit that shows natural hydrophobic property also is shown as.
Usually, aqueous tackifier compound of the present invention is inserted in the part of subterranean strata through mixing aqueous tackifier compound and servicing fluids.Suitable servicing fluids of the present invention can be aqueous fluids, emulsion, foam, or the underground fluid of any other form as known in the art.In some embodiments, servicing fluids of the present invention comprises fresh water.In some embodiments, salt water solution also can be used as servicing fluids, as long as the salinity of fluid can satisfactory activatable and/or gone to stablize said aqueous tackifier compound.According to the present invention, can also use aqueous gel, foam, direct nitrogen (straight nitrogen), carbon dioxide, emulsion and other suitable fracturing fluid (crosslinked is perhaps uncrosslinked).Aqueous gel generally includes water and one or more gels.Emulsion can be by two kinds of immiscible liquid, and the fluid for example liquid of water-setting gel and liquefaction, that be generally gas such as nitrogen or carbon dioxide constitute.In exemplary of the present invention, carrier fluid by water, be used for gelation water and increase the gel of its viscosity and optional be used for crosslinked said gel and further increase the aqueous gel that the crosslinking agent of fluid viscosity is formed.The viscosity that the perhaps gel of this gelation and crosslinked carrier fluid increase has reduced fluid loss especially, and possibly allow servicing fluids to transport a large amount of suspended prop particles.The water that is used for forming servicing fluids can be fresh water, salt water, salt solution or any other not negatively with the waterborne liquid of other component reaction.According to the present invention; Through making the use servicing fluids, the ambient influnence of underground processing can be minimized or reduce, particularly be poured in surperficial land, water or the extra large environment at servicing fluids; Perhaps said fluid is that (Section 1425 according to U.S.EPASafe Drinking Water Act; 42 U.S.C.3000h-4 (a), Section 1422 (b), U.S.C.300h-l (b)) under the situation of regulating.
That kind as mentioned above, aqueous tackifier compound is with normally inviscid when carrier fluid mixes." activator " that can comprise a large amount of different compounds is used to this aqueous tackifier compound of activation (that is tackify).Usually; Activator is organic acid (or can be in water hydrolysis produce organic acid organic acid acid anhydrides), inorganic acid, inorganic salts (for example salt solution), charged surfactant, charged polymer or their combination; But according to instruction of the present invention, any material that can make aqueous tackifier compound be not dissolved in the aqueous solution can be used as activator.The selection of activator can change according to the composition of aqueous tackifier compound particularly.Be fit to be used in an admixture that instance is an acetic acid/acetic anhydride of activator of the present invention.Other acid, ackd salt, acid anhydrides and their mixture also can be suitable.In addition, this is similar with condensing.For example, a lot of caoutchouc latex condense with acetate or formic acid in process of production.Suitable salt includes, but is not limited to: sodium chloride, potassium chloride, calcium chloride and their mixture.In another exemplary of the present invention, the salt or the concentration of other reactive compounds self that are present in the underground water can be enough to this aqueous tackifier compound of activation.In such embodiment, possibly there is no need to add external activator.Usually, when using, activator exists with the scope of the about 20 weight % of about 0.1 weight %-of Fluid Volume; Yet in some cases, for example under the situation of using salt solution, activator can surpass handling of fluids and aqueous tackifier compound.Yet, in instruction of the present invention, do not consider to trigger the necessary activator concentration of aqueous tackifier compound activation, any compound (it is insoluble for example, to cause that aqueous tackifier compound becomes) of aqueous tackifier compound activation that causes can use.
The kind of suitable activator species and appropriate pretreatment fluid is basic identical; Difference is employed amount and its service time at least in part.For example, use identical chemical agent or chemicals as pretreatment fluid and situation as activator under, pretreatment fluid can only account for the about 5 volume % of about 0.1 volume %-of the total amount of using.Those skilled in the art will recognize that pretreatment fluid mainly is used for accepting aqueous tackifier compound for the surface and prepares, is not to use with the amount that is enough to this water-based activator compound of abundant activation usually.In addition, in some embodiments, can needn't use activator fully.For example, the subterranean strata part that is processed possibly contain the salt of capacity in underground fluid, to such an extent as to simply aqueous tackifier compound is put into the stratum and let it contact with existing fluid, just will cause desirable activation.
Usually, tackified finish of the present invention can be carried out in any time in exploitation cycle of well, in the well that possibly comprise or not comprise the proppant filler, did not need again broken usually.For example, in concrete embodiment, through before any year granule fluid, aqueous tackifier compound being put into the crack, aqueous tackifier compound of the present invention can be used for the preliminary treatment crack.In another embodiment of the invention, through using this handling of fluids (comprising servicing fluids and aqueous tackifier compound) as broken fluid simply, aqueous tackifier compound can be used to handle the crack.And in the embodiment of another one again of the present invention, this aqueous tackifier compound can or be placed in the crack after break process, year particle on the contrary at once.By this method, processing cost can reduce greatly, and well yield decay can be modified, and prolongs the production life-span of well thus.
In addition, can, hydraulic fracture make aqueous tackifier compound be exposed to activator in handling with any different number of times repeatedly.In concrete embodiment of the present invention, activator can almost mix with carrier fluid simultaneously with aqueous tackifier compound.In this way, the aqueous tackifier compound in the introducing subterranean strata has been activated or has been at least in the process that is activated.In another embodiment of the invention, activator can be introduced in the subterranean strata (for example, aqueous tackifier compound can be activated for the previous period at it and be present in the subterranean strata) some time after aqueous tackifier compound is introduced the stratum.By this way, taking place under the fixed again situation of cement spallation or proppant particles or chip needs quilt, aqueous tackifier compound provides the ability in tackify crack, remedial ground.Those skilled in the art will recognize, the decision of premixed activator and aqueous tackifier compound depends in part on selected activator at least.For example, salt activator possibly trend towards than charged surfactant activation aqueous tackifier compound quickly.
For the ease of understanding the present invention better, the embodiment of the preferred embodiment below having provided.Following embodiment never should be understood that to limit the scope of the present invention or define.
Embodiment
Embodiment 1
Do guar polymer and 0.2ml acetate/ammonium acetate mixture (pH of mixture being reduced to about 6.5) through mixing 1 liter of water, 4.2 gram that contain 20 gram KCl salt as the pH buffer; And in mixer, mix making the guar gum hydration in about 10 minutes, contain the of the fracturing fluid base gel of borate crosslinked that 35lb does guar polymer to prepare 1000 gallons.After hydration step, add 2.5ml potash (as the pH buffer), the pH of last base gel is elevated to about 10.2.
Surfactant with 1ml quaternary ammonium salt (per 250 gram sand) comes treatments B rady sand (20/40 order), and the coating that forms with 3 weight %, by 40% polyacrylate polymers solution then carries out dry method to it and is coated with.
The 20/40 Brady sand that then 250 grams was coated with is placed in 1 liter of clean beaker; Add the said base gel solution of 300ml, thereafter with this beaker put into 140
with overhead blenderwater-bath.When mixing, with about 2 minutes the 0.32ml borate crosslink is joined in this base gel/proppant particulates slurry, make crosslinked beginning.
Obtained stable crosslinkedly, itself and the check experiment that proppant carried out of having used the present invention of no use to handle have been compared.Two kinds of fluids all keep stable, and this shows that solution of the present invention does not have significant negative effect for fluid stability; That is to say that it does not show for example can not adverse effect crosslinked or that too early rupture.
When destroying cross-linked gel with HCl, with the sand of coating separately and test, the result confirms viscosity and the improved T test performance (referring to embodiment 7) that it has hope.In addition, the coating performance that the sand of finding to be coated with does not need other activator to obtain hoping, this is at least in part because contain the cracking gel system of activator such as KCl, and it also shows gratifying activation pH to acrylic acid based polymer.
Embodiment 2
Use granularity to come the simulated formation sand less than 100 purpose Brazos River sands.This material is filled in the taper Teflon pipe box of 5 inches long 1 inch ID.With about 0.5 inch 20/40 thick purpose Ottawa sand be filled into the following of Brazos River sand material with above.Make the sand post saturated with 3% KCl salt solution then, and wash with several kinds of voids volumes (pore volume) with the speed of 5mL/min, to confirm the initial permeability of sand filler with this salt solution.Use handling of fluids (40% polyacrylate polymers solution, 0.5% activator, 0.1% cationic surfactant, 0.1% amphoteric surfactant, the surplus of 4 volume % are water) the treatments B razos River sand of 2 times of voids volumes then.Use this sand filler of KCl salt solution (3%) overdevelopment of 5 times of voids volumes thereafter.The sand post that to handle then is placed in the baking oven, 175
solidified 20 hours down.
After cure stage, the KCl salt solution of use 3% is set up to flow through the other way around and is processed flowing of sand post.Flow rate is remained on constant 5mL/min confirm the permeability that the sand filler is kept, be used for comparing with initial permeability.The sand filler that is processed has kept the permeability greater than 95%, in being used for setting up the 5mL/min KCl flow process that obtains again permeating, in the collected outflow liquid, does not produce the sign of chip.
The result of this embodiment has confirmed that this handling of fluids can the good ground sand material, does not cause the excessive destruction to sand filler permeability.
Embodiment 3
Except having used the various concentrations over control treatment fluid, repeat similar preparation and test program described in the embodiment 2 in the present embodiment.Use Brazos River sand simulated formation chip.This material is filled in the 5 inches long 1 inch ID taper Teflon pipe box.With about 0.5 inch thick Ottawa sand with 20/40 order granularity be filled into the following of Brazos River sand material with above.Make the sand post saturated with 3% KCl salt solution then, and wash with several kinds of voids volumes with the speed of 5mL/min, to confirm the initial permeability of sand filler with this salt solution.The handling of fluids (the 40% polyacrylate polymers solution of 2 volume %, 0.5% activator, 0.1% cationic surfactant, 0.1% amphoteric surfactant, surplus are water) that adds 2 times of voids volumes then.Use this sand filler of KCl salt solution (3%) overdevelopment of 5 times of voids volumes subsequently again.
The sand post that to handle then is placed in the baking oven, 175
solidified 20 hours down.After cure stage, use the foundation of 3%KCl salt solution to flow through the other way around and be processed flowing of sand post.Flow rate is remained on constant 5mL/min, confirm the permeability that the sand filler keeps, be used for comparing with initial permeability.
The sand filler that was processed has kept the permeability greater than 97%.In regaining the flow process of infiltration, in the collected outflow liquid, do not produce the sign of chip again.
Embodiment 4
Use Brazos River sand to come the simulated formation sand.This material is filled in the brass cells of two 1.5 inches ID, and it is clipped between the sand filler that is made up of 70/170 order sand.3% KCl normal saline washing sand post with 3 times of voids volumes; Next use handling of fluids (40% polyacrylate polymers solution, 0.5% activator, 0.2% surfactant, the surplus of 5 volume % are water) the flushing sand post of 2 times of voids volumes, and with the 3%KCl salt solution overdevelopment sand post of 3 times of voids volumes.
Then with a unit be placed on 175
baking oven in 20 hours, with one be placed on 325
baking oven in came the down-hole of simulation well to solidify in 20 hours.After cure stage, the sand of handling is taken out and observes its structure, shape and flexibility from the unit.The Brazos River sand of handling shows as the robust construction that presents said cell configuration.Although have with usually from the viewed negligible consolidation strength of consolidated rock, the Brazos River sand grains of handling bonds together the formation stable structure.
Embodiment 5
Used Brazos River sand to come the simulated formation sand.This material is filled in the brass cells of two 1.5 inches ID, and it is clipped between the sand filler that is made up of 70/170 order sand.3% KCl normal saline washing sand post with 3 times of voids volumes; Next use handling of fluids (40% polyacrylate polymers solution, 0.5% activator, 0.2% surfactant, the surplus of 5 volume % are water) the flushing sand post of 2 times of voids volumes, no longer adopt overdevelopment.
Then with a pillar of handling be placed on 175
baking oven in 20 hours, and with one be placed on 325
baking oven in came the down-hole of simulation well to solidify in 20 hours.After cure stage, with the sand of handling taking-up and observation structure, shape and flexibility from the unit.The Brazos River sand of handling shows as the robust construction of display unit shape once more.Although have usually from the viewed negligible consolidation strength of consolidated rock, the Brazos River sand grains of handling bonds together the formation stable structure.
Embodiment 6
Using screen size is that 200 orders and littler Brazos River sand chip come the simulate formation chip.This material is filled in the clear acrylic flow unit of 1 inch ID, so that observe.With the Ottawa sand of 20/40 mesh sieve eye be filled into the following of this formation fines material with above.Make the sand post saturated with 3% KCl salt solution then; And this salt solution with 5 times of volumes washes it; Next the handling of fluids (40% polyacrylate polymers solution, 0.5% activator, 0.2 surfactant, the surplus of 2 volume % are water) of using 2 times of voids volumes is to its flushing, uses 3% KCl salt solution overdevelopment sand post of 2 times of voids volumes then.
The sand post that to handle then be placed in the baking oven 140
solidified 20 hours down.After cure stage, the foundation of the KCl salt solution of use 3% is flow through with the processing procedure rightabout and is processed flowing of sand post.Flow rate begins to be 10mL/min, and is increased to 80mL/min gradually.Collect to flow out liquid to help to confirm in the flow process viewed result in said unit.All results show, compare with tester, and the pillar that is processed can be controlled the migration of chip fully in all flow velocitys.
As a comparison, with preparation equally but the sand post handled of tackifier fluids of no use as tester.Flow in case observe to have set up, detrital grain just begins to move in the sand filler immediately, and produces as a part that flows out liquid, even flow rate is 10mL/min.
Embodiment 7
Based on the volume of total handling of fluids, handle 20/40 Brady sand sample (41.25% polyacrylate polymers concentrate, 3.75% surfactant, 30% water, next 25% activator) with the amount of about 2% (v/w).Then sample being put into following described T detects: to accomplishing through following test as the compound liquid of tackified compound or the evaluation of solution: at first, and definite critical floating velocity again that will be coated with the material of this tackified compound.A kind of suitable testing arrangement comprise be connected to the inlet water source 1/2 " glass T type pipe, the outlet processing pipeline flows for fluid and seals.Be drawn in the T type pipe through the water-based slurry of inlet tube, and collect a part that is filled into through sieve with particle.Marquis when the T type partly is full of removes vacuum source and uses stopper to seal the end of this part.The flow channel scrub that will export from entering the mouth to then, and the pump that will control volume is connected to inlet, begins in check water flows.Increase fluid velocity lentamente, obtained the particulate material of first particle up to flowing water flow through inlet.This has confirmed to begin the baseline of floating velocity again.Next, further increase fluid rate, become continuously up to the migration of particle.This has confirmed the baseline of continuous floating velocity again.Next, can finish this test and with filling up particle in this device again, said this particle has corresponding to the coating that is applied the about 0.5 weight % active material of particle.The time marquis of institute's test concentrations, in the result, seen identical substantially trend, yet 0.5% content is preferred for standardized program in preferred coating scope for about 0.1-about 3%.Can repeat this and test to confirm the starting point that particle moves, and the said speed that becomes continuous that moves.Confirm that based on initial perhaps continuous baseline value speed increases the percentage of (or reduction) then.
Compare with untreated proppant particles, the proppant particles of effectively handling can be resisted conveying.Even work as testing arrangement with its maximum rate 2, when 000mL/min flowed, test sample did not demonstrate the sign of motion yet.The 20/40 Brady sand that is not processed begins to flow during for 154mL/min in speed; The opposing of the sand handled is higher than flowing of 13 times of flow rates of sand of not being processed.
Embodiment 8
Based on the volume of total handling of fluids, handle 20/40 Brady sand sample (40% polyacrylate polymers concentrate, 5% surfactant, 10% activator, surplus are water) with the amount of about 2% (v/w).With undressed 20/40 Brady sand facies ratio, this sample demonstrates has 13% raising to proppant filler conductibility.Also observe the proppant that is processed and show desirable adhesion characteristic, wherein single proppant is deadlocked and flexiblely be bonded together.
Embodiment 9
Confirm that a kind of method whether polymer is suitable as aqueous tackifier is: the mixture that preparation is made up of 50% acetic anhydride and 50% glacial acetic acid (v/v).The 10ml test polymer is put into the 60ml vial.Next, add 40ml deionized water and make its mixing with hand-screw is moving.Add 15ml acetic acid/acetic anhydride (or other activator) then.Shake bottle 30s tempestuously.Suitable polymers will form the perhaps semi-solid material of solid.Repeat to screen, for example salt, acid anhydrides, charged polymer, charged surfactant, sodium chloride, potassium chloride, calcium chloride and their mixture of the admixture of acetic acid/acetic anhydride, other acid, acid with other known activator.
Embodiment 10
Coal bed methane ground to showing low relatively individual well output is handled.Well yield receives the weakening that stops gas to flow into the coal chip of drilling well at least in part according to estimates.These wells have carried out hydraulic fracture in advance in a plurality of coal seams.Be used in the two mouthfuls of wells of solution-treated that comprise acetic anhydride, glacial acetic acid, polyacrylate ester polymer aqueous tackifier compound, enzyme and oxidant in the water.
First mouthful of well becomes the about 75MCFD after the processing from the methane production of handling precontract 43MCFD (Mille Cubic Feet/sky).Similarly, second mouthful of well becomes the about 105MCFD after the processing from the methane production of handling precontract 80MCFD.In addition, these observed results that are processed well show with its compared before processing, do not have detrital grain in the water that is generated; Thereby supported formation particles has been reached effective stable hypothesis.
Embodiment 11
Prepare the underground coal particle of 50ml (Subitmunious A) slurry with mortar and pestle from the coal stratum of drying, and it is placed in the bottle that is contained with fresh water, and make it become slurries.This coal/aqueous slurry of solution-treated that comprises acetic anhydride, glacial acetic acid, water and polyacrylate ester polymer aqueous tackifier compound then with 10ml.After the processing, in about 12 hours time, observed the initial flocculation of coal particle, observing these coal particles thereafter becomes the condensed matter that can when stir, break and form again.The water clarification does not have visible detrital grain to be retained in the solution.This embodiment is from visually having explained described coal fines stabilization and the process of from the aqueous solution, removing.
Embodiment 12
About 2cm square solid coal sample is placed in the 60ml bottle that fills water.Then this bottle is placed in the ultrasonic generator 10 minutes.The result is from a large amount of visible coal particle than the surface failure of rock of bulk.In another bottle, with the solution-treated coal sample much at one that comprises acetic anhydride, glacial acetic acid, water and polyacrylate ester polymer aqueous tackifier compound, then it is inserted in the water, put into ultrasonic generator again 10 minutes.The visual observation that is processed the coal sample is shown almost completely do not have the fragmentation from the coal surface of handling of coal chip to get off.
Embodiment 13
Handle on clastic stratum to showing the little consolidated gas of generation of hanging down well production.Receive the weakening that stops gas to flow into the chip of drilling well at least in part according to the guess well production.These wells are by hydraulic fracture in advance.Be used in the aqueous tackifier compound that comprises polyacrylate, acetic anhydride/acetic acid, quaternary surfactant, amphoteric surfactant, enzyme and oxidant in the water and handle this mouthful well.This well yield becomes 200MCFD from 30MCFD, and this has shown and has solved fines problem basically.
Embodiment 14
Handle 100 grams, 20/40 Brady sand (next 2% cationic polyacrylamide polymer concentrate, 94% water are 4% acetic anhydride/acetic acid activator) with 100ml cation tackifier fluids.After recovery, this Brady sand shows the viscous characteristics of hope.
Embodiment 15
Handle the coal chip sample (next 2% cationic polyacrylamide polymer concentrate, 1% anion surfactant, 93% water are 4% acetic anhydride/acetic acid activators) of 1 gram activation with 100ml cation tackifier fluids.In 5 minutes, the fixed stickum that becomes of this chip.
Embodiment 16
Handle the coal chip sample that 1 gram is activated (next 2% cationic polyacrylamide polymer concentrate, 1% anion surfactant, 1% amphoteric surfactant, 92% water are 4% acetic anhydride/acetic acid activators) with 100ml cation tackifier fluids.In 5 minutes, the fixed stickum that becomes of this chip.
Therefore, the present invention is fit to realize mentioned purpose and advantage and self those intrinsic advantage very much.Though those skilled in the art can much change, such change all is included in the following appended spirit of the present invention that claim limited.
Claims (44)
1. method of controlling particle, this method comprises:
Aqueous tackifier compound is placed in the part that comprises the subterranean strata of fixed particle not, and wherein said aqueous tackifier compound comprises acrylate copolymer, acrylate polymer, acrylic acid derivative polymer, acrylate homopolymer, Voncoat R 3310, acrylamido-methyl-propane sulfonic acid ester polymer, acrylamido-methyl-propane sulfonic acid ester derivant polymer, acrylamido-methyl-propane sulfonic acid ester copolymer, acrylic acid base-methyl-propane sulfonic acid ester copolymer and their copolymer or their mixture; And,
With the said aqueous tackifier compound of activator activation; This activator is used for promoting the indissolubility in aqueous tackifier compound; To be formed on the unsclerotized coating on the said particle, wherein said activator comprises organic acid, organic acid acid anhydrides, inorganic acid, inorganic salts, charged surfactant, charged polymer or their combination.
2. the process of claim 1 wherein that said aqueous tackifier compound mixes with servicing fluids before the said part that is placed into subterranean strata.
3. the method for claim 2, wherein said servicing fluids comprises aqueous fluids, emulsion or foam.
4. the method for claim 2, wherein said servicing fluids comprises fresh water, salt water or their combination.
5. the method for claim 2, wherein said servicing fluids is crosslinked.
6. the process of claim 1 wherein that said aqueous tackifier compound was activated before aqueous tackifier compound being introduced in the subterranean strata.
7. the process of claim 1 wherein that said aqueous tackifier compound is activated when introducing aqueous tackifier compound in the subterranean strata.
8. the process of claim 1 wherein that said aqueous tackifier compound is activated after aqueous tackifier compound being introduced in the subterranean strata.
9. the process of claim 1 wherein on the surface that said aqueous tackifier compound preferentially is bonded to has positive ξ electromotive force.
10. the process of claim 1 wherein that said aqueous tackifier compound preferentially is bonded on the hydrophobic surface.
11. the process of claim 1 wherein on the surface that said aqueous tackifier compound preferentially is bonded to has negative ξ electromotive force.
12. the process of claim 1 wherein that said aqueous tackifier compound preferentially is bonded on the hydrophilic surface.
13. the process of claim 1 wherein that the activation aqueous tackifier compound comprises makes said aqueous tackifier compound go to stablize.
14. the process of claim 1 wherein that the activation aqueous tackifier compound comprises makes said aqueous tackifier compound be exposed to activator.
15. the process of claim 1 wherein that said activator comprises the admixture of acetic acid/acetic anhydride.
16. the method for claim 1, it further comprises, in a part of aqueous tackifier compound being introduced subterranean fracture before, pretreatment fluid is introduced in the said part of subterranean strata.
17. the method for claim 16, wherein said pretreatment fluid was introduced in the said subterranean fracture before aqueous tackifier compound being introduced in the subterranean fracture.
18. the method for claim 16, wherein said pretreatment fluid comprise charged surfactant, charged polymer or their combination.
19. a method that is coated with the part surface of subterranean strata, this method comprises:
Fully aqueous tackifier compound is applied on the part of subterranean strata, wherein said aqueous tackifier compound comprises acrylate copolymer, acrylate polymer, acrylic acid derivative polymer, acrylate homopolymer, Voncoat R 3310, acrylamido-methyl-propane sulfonic acid ester polymer, acrylamido-methyl-propane sulfonic acid ester derivant polymer, acrylamido-methyl-propane sulfonic acid ester copolymer, acrylic acid base-methyl-propane sulfonic acid ester copolymer and their copolymer or their mixture; And
With the said aqueous tackifier compound of activator activation; This activator is used for promoting the indissolubility in aqueous tackifier compound; To be formed on the unsclerotized coating on the said particle, wherein said activator comprises organic acid, organic acid acid anhydrides, inorganic acid, inorganic salts, charged surfactant, charged polymer or their combination.
20. the method for claim 19, wherein said aqueous tackifier compound are mixed with servicing fluids in being placed into the said part of subterranean strata before.
21. the method for claim 20, wherein said servicing fluids comprises aqueous fluids, emulsion or foam.
22. the method for claim 20, wherein said servicing fluids comprise fresh water, salt water or their combination.
23. the method for claim 20, wherein said servicing fluids is crosslinked.
24. the method for claim 19, wherein said aqueous tackifier compound was activated before aqueous tackifier compound being introduced in the subterranean strata.
25. the method for claim 19, wherein said aqueous tackifier compound is activated when introducing aqueous tackifier compound in the subterranean strata.
26. the method for claim 19, wherein said aqueous tackifier compound is activated after aqueous tackifier compound being introduced in the subterranean strata.
27. the method for claim 19, wherein said aqueous tackifier compound preferentially are bonded on the surface with positive ξ electromotive force.
28. the method for claim 19, wherein said aqueous tackifier compound preferentially is bonded on the hydrophobic surface.
29. the method for claim 19, wherein said aqueous tackifier compound preferentially are bonded on the surface with negative ξ electromotive force.
30. the method for claim 19, wherein said aqueous tackifier compound preferentially is bonded on the hydrophilic surface.
31. comprising, the method for claim 19, wherein activation aqueous tackifier compound make aqueous tackifier compound go to stablize.
32. comprising, the method for claim 19, wherein activation aqueous tackifier compound make aqueous tackifier compound be exposed to activator.
33. the method for claim 19, wherein said activator comprises the admixture of acetic acid/acetic anhydride.
34. the method for claim 19, it further comprises, before on the part that aqueous tackifier compound fully is applied to subterranean strata, pretreatment fluid is introduced in the said part of subterranean strata.
35. the method for claim 34, wherein said pretreatment fluid comprise charged surfactant, charged polymer or their combination.
36. handling of fluids that is used to control detrital grain; It comprises servicing fluids and aqueous tackifier compound; Wherein said aqueous tackifier compound comprises acrylate copolymer, acrylate polymer, acrylic acid derivative polymer, acrylate homopolymer, Voncoat R 3310, acrylamido-methyl-propane sulfonic acid ester polymer, acrylamido-methyl-propane sulfonic acid ester derivant polymer, acrylamido-methyl-propane sulfonic acid ester copolymer or acrylic acid base-methyl-propane sulfonic acid ester copolymer; And also comprise activator; This activator is used for promoting the indissolubility in aqueous tackifier compound; To be formed on the unsclerotized coating on the said particle, wherein said activator comprises organic acid, organic acid acid anhydrides, inorganic acid, inorganic salts, charged surfactant, charged polymer or their combination.
37. the handling of fluids of claim 36, wherein said servicing fluids comprises aqueous fluids, emulsion or foam.
38. the handling of fluids of claim 36, wherein said servicing fluids comprise fresh water, salt water or their combination.
39. the handling of fluids of claim 36, wherein said servicing fluids is crosslinked.
40. the handling of fluids of claim 36, wherein said aqueous tackifier compound preferentially are bonded on the surface with positive ξ electromotive force.
41. the handling of fluids of claim 36, wherein said aqueous tackifier compound preferentially is bonded on the hydrophobic surface.
42. the handling of fluids of claim 36, wherein said aqueous tackifier compound preferentially are bonded on the surface with negative ξ electromotive force.
43. the handling of fluids of claim 36, wherein said aqueous tackifier compound preferentially is bonded on the hydrophilic surface.
44. the handling of fluids of claim 36, wherein said activator comprises the admixture of acetic acid/acetic anhydride.
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| US10/864,061 US8076271B2 (en) | 2004-06-09 | 2004-06-09 | Aqueous tackifier and methods of controlling particulates |
| US10/864,061 | 2004-06-09 | ||
| PCT/GB2005/001946 WO2005121501A2 (en) | 2004-06-09 | 2005-05-17 | Aqueous tackifier and methods of controlling particulates |
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| CN1985067A CN1985067A (en) | 2007-06-20 |
| CN1985067B true CN1985067B (en) | 2012-02-22 |
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| CN2005800188842A Expired - Fee Related CN1985067B (en) | 2004-06-09 | 2005-05-17 | Methods of controlling particulates, method for coating partial surface of underground stratum and fluid for controlling clastic particles |
Country Status (10)
| Country | Link |
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| US (1) | US8076271B2 (en) |
| CN (1) | CN1985067B (en) |
| AU (1) | AU2005252418B2 (en) |
| CA (1) | CA2565171A1 (en) |
| DE (1) | DE112005001351T5 (en) |
| GB (1) | GB2429997C (en) |
| RU (1) | RU2382173C2 (en) |
| UA (1) | UA92152C2 (en) |
| WO (1) | WO2005121501A2 (en) |
| ZA (1) | ZA200610278B (en) |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109536158A (en) * | 2017-09-21 | 2019-03-29 | 中国石油化工股份有限公司 | A kind of low-density ceramic proppant and preparation method thereof |
| CN109536158B (en) * | 2017-09-21 | 2021-11-26 | 中国石油化工股份有限公司 | Low-density ceramsite proppant and preparation method thereof |
Also Published As
| Publication number | Publication date |
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| RU2382173C2 (en) | 2010-02-20 |
| AU2005252418B2 (en) | 2010-07-15 |
| UA92152C2 (en) | 2010-10-11 |
| GB2429997A (en) | 2007-03-14 |
| GB2429997C (en) | 2011-12-28 |
| US8076271B2 (en) | 2011-12-13 |
| WO2005121501A3 (en) | 2006-04-27 |
| US20050277554A1 (en) | 2005-12-15 |
| AU2005252418A1 (en) | 2005-12-22 |
| CN1985067A (en) | 2007-06-20 |
| CA2565171A1 (en) | 2005-12-22 |
| WO2005121501A2 (en) | 2005-12-22 |
| GB2429997B (en) | 2009-06-03 |
| RU2006147287A (en) | 2008-07-20 |
| DE112005001351T5 (en) | 2007-06-06 |
| GB0623403D0 (en) | 2007-01-03 |
| ZA200610278B (en) | 2008-06-25 |
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